There have been so far small research works on highway weaving sections and the design and operation methods of the weaving sections have not yet established in Japan. In the U. S. A the analysis methods have been revised drastically in the new HCM-1985 compared to the old edition. However there remain still discussions on it among researchers. Several analysis procedure have been proposed so far and studies are going on still now. This paper reviews those development about the weaving analysis study and presents also the state of arts on the traffic flow characteristics and capacity study concerning weaving sections in Japan. It also perspectives the future study problems.